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Filename Latest commit message Latest commit date
Alexei Starovoitov a9c676bc8f bpf/verifier: fix verifier instability
Edward Cree says:
In check_mem_access(), for the PTR_TO_CTX case, after check_ctx_access()
has supplied a reg_type, the other members of the register state are set
appropriately.  Previously reg.range was set to 0, but as it is in a
union with reg.map_ptr, which is larger, upper bytes of the latter were
left in place.  This then caused the memcmp() in regsafe() to fail,
preventing some branches from being pruned (and occasionally causing the
same program to take a varying number of processed insns on repeated
verifier runs).

Fix the instability by clearing bpf_reg_state in __mark_reg_[un]known()

Fixes: f1174f77b5 ("bpf/verifier: rework value tracking")
Debugged-by: Edward Cree <ecree@solarflare.com>
Acked-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-09-05 22:21:00 -07:00
arch dma-mapping fixes for 4.19-rc2 2018-09-02 20:09:36 -07:00
block block: bsg: move atomic_t ref_count variable to refcount API 2018-08-27 19:17:02 -06:00
certs
crypto
Documentation Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-09-04 21:33:03 -07:00
drivers net: lan743x_ptp: make function lan743x_ptp_set_sync_ts_insert() static 2018-09-05 08:07:05 -07:00
firmware
fs Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-09-02 09:41:45 -07:00
include packet: add sockopt to ignore outgoing packets 2018-09-05 22:09:37 -07:00
init Kbuild updates for v4.19 (2nd) 2018-08-25 13:40:38 -07:00
ipc
kernel bpf/verifier: fix verifier instability 2018-09-05 22:21:00 -07:00
lib Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-09-02 09:41:45 -07:00
LICENSES
mm notifier: Remove notifier header file wherever not used 2018-08-30 12:56:40 +02:00
net netlink: Make groups check less stupid in netlink_bind() 2018-09-05 22:11:33 -07:00
samples samples/bpf: xdpsock, minor fixes 2018-09-01 01:36:08 +02:00
scripts Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-09-02 10:11:30 -07:00
security + Cleanups 2018-08-24 13:00:33 -07:00
sound
tools libbpf: Remove the duplicate checking of function storage 2018-09-05 22:16:00 -07:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap libnvdimm-for-4.19_misc 2018-08-25 18:13:10 -07:00
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS dpaa2-eth: Move DPAA2 Ethernet driver from staging to drivers/net 2018-09-01 17:16:59 -07:00
Makefile Linux 4.19-rc2 2018-09-02 14:37:30 -07:00
README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.